static program not working

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I try to run a static program, for example testdiskstatic. The answer "bash: testdiskstatic: Befehl nicht gefunden..." (command not found) but with "ls" the program is showed and I am in the same directory al the program. The documentation says: "This Linux version of TestDisk & PhotoRec should work on any 2.6 i386 or x8664 kernel. It's a static version, the binary doesn't depend on shared libraries." I use fedora 28. I ask in the forum, because command nor found seems to be an mistake of fedora an not of the program If I try "sudo dnf install" also "Kein Treffer für Argument: testdiskstatic" (No hit for argument) greetings an thanks for any answers.